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In another fourm Im being told I need to change my tuning frequency from 32hz to around 60hz. Im running a FI q 12 d2 with a Crossfire VR 1000d. It would be for outlaw spl only not daily. FI doesnt recommend going outside of there suggestions, could any harm be done to my sub by tuning it this high ? Would there be any gains ?

My enclosure is built at 2.5 cuft, my current port area is 10x4x21, tuned to 39 hz, I want to change this so its tuned to 32 and I would need to add 14 in in length, unfortunatly not possible. So I looked into it and I could change my port to 10x3x25, what will I lose(or gain) by changing the port area ?

port needs to be a little longer around 35 inches

my bad, its 40w x 15d x 12h with a 10 x 4 x 21 in port

ok built my enclosure, 40w x 15d x 10h external dimensions w/ 3/4 mdf port is 10h x 4w x 21l im getting different answers on cu ft, what did i end up with when all is said and done ? ive been out of this for so long i feel like an idiot with all the questions, but you guys are a really great help. THANK YOU

Im not out to break records or anything, only 1000 watts on it, I just wanted to build a enclosure for USAC SB 1 show coming up

I want to build a SPL enclosure for a show coming up and wasnt quite sure about size and port. What I was going to build was... 42" x 15" x 10" with a port that was 10" x 4" x 21" Will this be good ?

Mine is 1.4 before displacement with a Crossfire Vr 1000d and it is amazing.

My enclosure is 1.3 cu ft sealed, should I add some poly-fill to soften the boom a little if so how much should I use, 1lb, 2lb, somewhere inbetween ? Thank you.

explain what the tracking says and i can get you an answer, I work for UPS. I do this daily

After speaker displacement I have 2.46 cu ft, I need to figure the port for tuning to 32 hz (recommended by Fi) I was looking at about 28 sq in of port, how long would the port be ? Do I need more port area ? If so what would recommend ? My enclosure is 43w x 14h x 7.5d(combination of top and bottom divided x 2). Thank you for all your help.

I can go ported, the internal dimesions of the box are: 43w x 14h x 10(bottom) 5(top) x 7.5 deep w slant front wich comes to 2.61 cu ft, minus .16 cu ft for displacement of sub, if I go ported what would be the best port setup for music: 32 hz (recomended by Fi) ? I can do the port out top of box. I can do 24 sq in port x 18.75 in long ? does this sound right ?

I have a 04 Ford Expedition, i have built a enclosure behind the 3rd row seat, what i have is 2.46 cu ft, I would prefer a sealed enclosure, I know this is large for sealed, but i can shrink it if needed, my question is: should i go smaller ? It is powered by a Crossfire VR 1000d, I listen to mostly music like: Slayer, Exodus, I also listen to alot of classic rock, metal, punk, etc...ever so often I will play a few bass cd's I have from the days I did dB Drag shows. Thank you for your help.